Lawn mower sharpener



C. T. MCILYAR LAWN MOWER SHARPENER Filed Oct. 212J 1932 Oct. 3, 1933'.

Patexltd Oct's, 1.933 i 1929.32.6' l. 'JLAWNN Io'vvlm SBARPENER] CharlesfrfnMcnyar, Mai-retta, ohiiq f Application oc'zoberzz; 1 9''2,f se'ia1N.139,os5 j s cli'insgjl.imnanf VThis invention reiatesito improvements ifdeattire rear of the machine' is shown'v in fooi-.tea vices for sharpening theiblades of a lawnjmower; lines and `indicated by the numeral 10.

The primary objectfof the present invention The sharpening device'embodyingithe present is to provide a .devicewhereby the reel blades of i nvention consists of the *sharpening bar or le 5 a lawn mower may be sharpened without `removbar 11 whichl has bothside faces provided with i60;.

ing the same from position. file teeth as indicatedat 12.` This file bar is pro- Another'object of the invention is to provide videdadjacent each lend with an aperture 13 a device for sharpening the reel blades of a'lawnA 'which isvcounter-sunk on both sides of the bar mower which is designed to be' applied to the as shown so that whichever toothed surface of cutter bar Aso that the blades may bemadeto the le vb ariis uppermost whenfin use the'head 65'V wipe across the sharpening element and thereby vof the stove bolt 14 which is extended theresharpened and at the same time trued for corthrough will have its top surface below the top i rect vContact with the cutter bar. Y. face `of the file.` g l, Y

A further object ofthe invention is vto provide Each of the kopenings '13 "has, the stove. bolt y 15 a device for sharpening and truing the reel blades therein and this bolt also passes through` an un- 7931.. Y of a mowing machine Ywhich may be'easily'and derlying` clamp bar 15l which yextends parallel L quickly placed in position forense with only a with the under Vface of the file. 1 v slight change in. the mowing machine structure. Connected with each of the bolts 14 at thev side rllhe invention will be best understood from -a of the clamp bar 15' remote'from ltheflle 11 is consideration of the followingY detailed descripthe flattened headl ofthe elongated bolt'l'?. 75A tion taken in connection with the accompanying The end of each bolt 17 remote from the head 16,l drawing forming part of this specification, with. A which as shown is provided withtwo openings the understanding, however; that the invention .which are indicated by thenumeralsl` and is not conned -to any strict conformity with .through one of which the boltv 14 passes, isscrewthe showing of the drawing but maybe changed threaded to receive a nut 19'. i f V y 80"'. or modifledso long as such changes or modica- This threaded end of each. bolt 17 vpasses' tions mark no material departure from the throughpone of the two apertures .20 in a clamp salient features of the invention as expressed in bracket 21, one Vend'of which is .provided with the the appended claims. Y l annular ange 22 as shown in Figure 1 and 3. j 30 In the drawing:- In applying the present Sharpener' for use the .85: Figure 1 is a view in transverse section of a supportingroller 10 of Vthejmower is removed'andV lawn mower showing the application `of the Y the adjustingbolts 9 are manipulatedso that the 'sharpening'device tothe cutter bar thereof; edge of the cutter bar will be dropped ldown Figure -2 is a view in plan of the under side of away from the lowerinost blade 4.a sufficient-dis- V the sharpening device; i tance to permit of the insertion of the lell be- 901.

`Figure 3 is a view in transverse section taken Vtween thecutter bar and the overlying one of the upon the line 3 3 of Figure 2, the same beingk blades. The clamp bar`15 will be positioned beupon an enlarged scale. Y Y neath the cutter bar,` and the nut 23 upon the bolt Referring now more ,particularly to the draw- `14 is then tightened .up soas to securelybind the y* 40 ing wherein like numerals of reference indicate Vcutterbar between the file 11 and the clampgbar. 95

' corresponding parts tl'iroughout the several 1 The clamp brackets 21 are then placed in posiviews, the numeral 1 indicates the driving wheel tion o n the .outer'ends of the bolts 1'7, the'flat at one end of a lawn mower with the frame pore heads Yof which are held against the clamp bar tion 2 of which is connected one endvof the ro- 15'and thenut 23 in the manner illustrated and tatable shaft upon which the-reel blades. 4 are the nuts *19 are threaded Vonto 'the `bolts j1'1to 100*r carried. VThe mower cutter ybar is indicated by l draw' the brackets 21upj,againstthe rear of the f the numeral 5 and this'is shown l.mounted uponcutter' bar support 6 with thev flanged edges the usualsupport bar 6 which is oscillatably care thereof. engaging over the top edge ofthe support. ried .at each end upon apin 7. supported by the J The.y necessary readjustment is then made of the adjacent' rearwardly extending portion, 8 ofthe 'screws Qtoraise the file 11 tothe position wherero machina Y Y the edges ofthe'blades 4 will sweeprlover the,Vv The usual adjusting screws for regulating the f surface of the legwhen'thejshaft 3 is rotated.. position of the cutter bar 5 with respect tothe The shaft and lbladesmay thenrbehturned by `cutting' edges of the blades 4, are indicated by hand so as toslowly pass the cuttingedges.of}j f .55- the numerals 9 and the usual supportingroller the blades--overthe file andthus 'the' edgeswill 11D be sharpened and cut down to a smooth surface and will be properly aligned with the edge of the;- cutter bar [with which the top surface of the file Ais parallel. After removing the sharpening device from thecutterlbar the screws 9 will then be adjustedvso asto move the edge of the cutter bar baci; into the positioni where the edges of thev blades will pass thereover in the proper relation to eiectacutting of the grass. Y

Having thus described the invention, what ,is claimed is:-V

1. A Sharpener for av lawn mower having" a ro'- I tating blade structure and a fixed cutter bar co-kI acting therewith', lcomprising anv elongated flat sharpening body, an elongated flat barinparalleil relation with the sharpening body,A boltfmeains connecting the body and the clamp brackets carried by said last"mentioned bolts, said sharpening body receiving the cutterbar therebetween and said clamping brackets being designed to engage the back edgeofthecutter bain.'` l l p l 2. vA Sharpener ,for a lawnr mower having roih clamping'bar, a pair*v of bolts connected with theclarriping-'baran'di and clamping 'bar 3. vA Sharpener for a lawn mower having rotatable cutting blades and a xed cutter bar, com- Y prising a pair of elongated rigid bodies, one of which' bodies constitutes a .sharpening element, between which bodies the cuttery bar is located with saidl'ele'm'ent on top, means connecting said bodiesvfor'drawing the same together against the interposed bar, said connecting means extending"`a`cross the forward edge of the bar, and a holding element connected with the under one of thebodies and attached to the rear of the b ar for preventing forward movement of the bodies. 

